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Une première solution :
179*224 pour 2 fois chaque chiffre

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Pour 3 fois chaque chiffre
368 x 7595
818 x 9395
938 x 5342

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   179
   224
   716
  358
358  
40096

     938
    5342
    1876
   3752
  2814
4690     
5010796

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il te manque des solutions pour 3 fois chaque chiffre

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Vham, parmi les milliards d'humains sur cette terre, tu es le seul à avoir trouvé quelques solutions. Tu mérites pour le moins une statue … tout ça pour dire que mon problème ne semble pas avoir intéressé grand monde.
Ceci dit, s'il te manque des solutions pour 3 fois c'est, je pense, que tu n'as pas examiné toutes les dispositions possibles avec 30 nombres. Pour 4 fois il y a aussi plusieurs solutions de plusieurs dispositions différentes.

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(368, 7595)
(818, 9395)
(938, 5342)
(14738, 245)
(17906, 245)
(173, 49406)
(329, 53120)
(203385, 87)
(285378, 75)
(287633, 68)
(290732, 65)
(313284, 96)
(344402, 89)
(345581, 89)
(348179, 65)
(358964, 35)
(359484, 75)
(390695, 74)
(391686, 75)
(439308, 45)
(440798, 74)
(446115, 78)
(484295, 47)
(532356, 39)
(547658, 35)
(566384, 83)
(571782, 96)
(601934, 92)
(613754, 98)
(620549, 53)
(641256, 39)
(652349, 32)
(661878, 45)
(674627, 83)
(691956, 45)
(695376, 45)
(697178, 59)
(718538, 65)
(724269, 87)
(765413, 26)
(769808, 23)
(771416, 35)
(782285, 56)
(784568, 95)
(786843, 63)
(790407, 54)
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(807698, 23)
(833636, 95)
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(844347, 96)
(851702, 29)
(851828, 47)
(852383, 23)
(855347, 29)
(865346, 29)
(886547, 23)
(897755, 38)
(903618, 63)
(913907, 86)
(916205, 38)
(945147, 96)
(954138, 42)
(960309, 36)
(963089, 26)
(963815, 38)
(968715, 36)
(969057, 36)
(27, 249507)
(89, 513170)
(89, 531017)
(89, 701315)
...

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from collections import Counter

def check(a,b,k):
   c = Counter(str(a))
   sb= str(b)
   c.update(sb)
   for d in sb:
      if d != '0':
         c.update(str(int(d)*a))
   c.update(str(a*b))
   return all(c[e] == k for e in '1234567890')

def getA(na,k):
   global c
   if na == 1:
      for d in '123456789':
         if c[d] < k:
            yield int(d)
   else :
      for d in '0123456789':
         if c[d] < k:
            c[d] += 1
            for a in getA(na-1,k):
               yield a*10+int(d)
            c[d] -= 1

def getB(nb,a,k):
   global c
   if nb == 1:
      for d in '123456789':
         if c[d] < k :
            c[d] += 1
            c.update(str(a*int(d)))
            if all( e <= k for e in c.values()):
               yield int(d)
            c -= Counter(str(a*int(d)))
            c[d] -= 1
   else :
      d = '0'
      if c[d] < k :
         c[d] += 1
         for b in getB(nb-1,a,k):
            yield b*10+int(d)
         c[d] -= 1
      
      for d in '123456789':
         if c[d] < k :
            c[d] += 1
            c.update(str(a*int(d)))
            if all( e <= k for e in c.values()):
               for b in getB(nb-1,a,k):
                  yield b*10+int(d)
            c -= Counter(str(a*int(d)))
            c[d] -= 1

c = Counter()
def solve(k=2):
   global c
   L = [(na,nb) for na in range(1,(10*k-1)//3+1) for nb in range((k*10-na+2)//(na+3),(k*10-2*na+1)//(na+2)+1)]
   L.sort(key = lambda e : (sum(e),max(e),e))
   S = []
   for na,nb in L:
      print("Testing ",na,nb)
      for a in getA(na,k):
         for b in getB(nb,a,k):
            if check(a,b,k):
               print(a,b)
               S.append((a,b))
   return S
   

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('Testing ', 3, 4)
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(938, 5342)
(368, 7595)
('Testing ', 3, 5)
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('Testing ', 5, 3)
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(14738, 245)
('Testing ', 2, 6)
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(56, 197087)
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(89, 356210)
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('Testing ', 6, 2)
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('Testing ', 1, 7)
('Testing ', 1, 8)
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('Testing ', 1, 9)
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('Testing ', 9, 1)
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...

 Cliquez pour afficher

('Testing ', 4, 5)
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('Testing ', 5, 4)
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('Testing ', 3, 6)
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('Testing ', 3, 7)
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(594, 5330790)
(594, 2075904)
(594, 5200794)
(594, 3040389)
(794, 5908280)
(794, 5402480)
(794, 2940908)
(794, 5230049)
(906, 8090256)
(906, 3039096)
(906, 9050637)
(746, 8292005)
(956, 8200265)
(396, 6700554)
(107, 8695241)
(107, 2869514)
(707, 8320790)
(707, 8320097)
(717, 8720940)
(717, 4920780)
(717, 4406907)
(527, 3946007)
(927, 7693200)
(927, 2067390)
(927, 2082069)
(737, 8290034)
(857, 7042280)
(267, 2792730)
(267, 2923077)
(567, 7902504)
(177, 9205446)
(977, 6450023)
(587, 9060782)
(587, 7905083)
(587, 7307609)
(597, 5602380)
(897, 7036950)
(108, 5813937)
(108, 1953387)
(908, 9025037)
(908, 9030257)
(908, 6047909)
(828, 2090457)
(158, 4455614)
(158, 4454615)
(158, 5254256)
(158, 2542556)
(378, 7550073)
(878, 9070454)
(788, 4963007)
(209, 4579403)
(209, 4749053)
(209, 4350983)
(209, 3490475)
(209, 3803495)
(609, 9720507)
(809, 6490970)
(809, 4099085)
(809, 9097046)
(809, 6490079)
(909, 3020796)
(819, 7264800)
(629, 7905230)
(729, 8006724)
(729, 8503074)
(729, 9700884)
(729, 6309027)
(929, 3058790)
(929, 2050943)
(929, 3450029)
(929, 4005329)
(639, 7840062)
(939, 2658300)
(939, 2049630)
(939, 2560830)
(939, 5038260)
(939, 3089760)
(939, 2403690)
(459, 6309540)
(959, 4298600)
(959, 2684090)
(269, 2453039)
(869, 2005697)
(869, 5309039)
(969, 3576090)
(689, 5099402)
('Testing ', 7, 3)
...

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('Testing ', 5, 5)
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...